--- roundcubemail.old/program/steps/mail/func.inc	2011-01-22 17:42:23.000000000 -0800
+++ roundcubemail/program/steps/mail/func.inc	2011-01-19 22:23:41.000000000 -0800
@@ -665,7 +665,7 @@
 
   // trigger plugin hook
   $data = $RCMAIL->plugins->exec_hook('message_part_before',
-    array('type' => $part->ctype_secondary, 'body' => $part->body) + $p + array('safe' => false, 'plain' => false, 'inline_html' => true));
+    array('type' => $part->ctype_secondary, 'body' => $part->body, 'id' => $part->mime_id) + $p + array('safe' => false, 'plain' => false, 'inline_html' => true));
 
   // convert html to text/plain
   if ($data['type'] == 'html' && $data['plain']) {